Not sure either sorry. Having real issues with collision detection on a jumpthru tilemap myself at the moment causing my player to fall through the floor if falling or jumping. Very odd and frustrating to say the least.

Thanx man, it looks like a good start, however, it seems @jimwills is right, even in this example, the player sprite will fall through the jumptrough tile (?!) when landing on it after a jump...

Moreover, usage of the tilemap (in my case) was to reduce the number of object I use in the layout, to optimize my game for mobile, yet this setup is even more CPU consuming than just using individual objects... Not sure what object count is the threshold...

The above tileeraseoncollision (2).capx uses 35% of my CPU and I get 50 FPS at most, and this one:

https:// dl.dropboxusercontent.com/u/6116050/spawnoncollision .capx

I get 60 FPS and 12% CPU usage... will test a bit more with more objects to see how it affects the CPU usage....